Clamp meters using current transformer for ac measurement current transformer clamp meters are equipped with rigid jaws of made of ferrite iron. Ampere is the unit of current so an ammeter is a meter or an instrument which measures current. It is often incased in glass and has a disk that rotates that measures the amount of power product of current and voltage the flows through the meter. Consequently, the magnetic field around the conductor is fixed. Steps for measuring ac or dc current using a clamp meters jaws. Construction of phase or line tester following are the main parts of a typical phase or line tester.
Fhp motors, repulsion motor, stepper motor, hysteresis motor, reluctance motor. Hall effect clamp meter tong tester used to measure ac as well as dc current. Apr 14, 2020 an electrical meter with an integral ac current clamp is known as a clamp meter, a clampon ammeter, a tong tester or, colloquially, an amp clamp. It is compact in size and very easy to carry and operate. Tong tester are more than current meters these days, they can measure ac and dc volts, ac and dc current, temperature, capacitance and frequency. Clamp meters are available with small sized cords for testing the flow of electricity current in the electrical appliances.
We are offering a wide spectrum of testing instruments such as tong tester that is extensively used for dependable testing of various parameters. A digital multimeter is essentially a voltagemeasuring tool with some current abilities. Manual and automatic test cases an effective testing process must include both manually and automatically produced test cases. Three phase energy meter working,construction an energy meter is used to measure the energy consumed in the kilowatt hours.
Manual tests take advantage of the testers domain knowledge to do more indepth testing. Clamp meter tong tester is one of the most useful test equipment. An ammeter is an instrument used to measure direct current and alternating current in an electric circuit. A wide variety of tong tester options are available to you, such as digital only. Metallic rod and mouth it is a cylindrical metal rod. The arm of tong tester senses the magnetic flux of the primary winding i. Clamp meters working principle instrumentation tools. Pyrometer, device for measuring relatively high temperatures, such as are encountered in furnaces. A typical multimeter may include features such as the ability to measure. A fluke tong test ammeter is located in the inlet circuit of phase a to measure the current of iacin the ac circuit. Voltage for testing produced by hand operated megger by rotation of crank in case of hand operated type, a battery is used for electronic tester. The flat end mouth is used as a screw driver or touch electrical conductorswires to f.
The complete guide to electrical insulation testing. An electrical meter with integral ac current clamp is known as a clamp meter, clampon ammeter, tong tester, or colloquially as an amp clamp. Working principle of speedometer is the torque of the motion of the wheels is read through a meter and is visible to the user. In years past, electricians used test probes rather than a clamp to measure current. The usual analog multimeter when used for voltage measurements loads the circuit under test to some extent a microammeter with fullscale current of 50. This is used in each and every house and industry for calculating the energy consumed by them. As shown in a figure at left, a hall element is placed across a gap created by cutting off part of the transformer jaws. The top countries of suppliers are china, hong kong s. When the dial is in the correct position, shows on the display, meaning that the readings are coming from the flexible probe. An electrician who has a good grounding in the fundamentals of. Capacitors explained the basics how capacitors work working principle duration. Job functions applications key features recommended clamp electrical contractor working on panels and branch circuits measure loads on a branch circuit at a panel including feeder cables.
Mar 28, 2016 how a acdc clampmeter works kainkalabs. Due to the high harmonic content in the signal coming out of a vfd to the motor, a dmm would measure most of the voltage content depending on its input bandwidth. Accessories for impact testing machines, self centering. Yukon department of education box 2703 whitehorse,yukon canada y1a 2c6. The columbia tong test ammeter illustrated is an example of the iron vane type, used for measuring large ac currents up to. We clean your instrument, check fuses, replace battery if required and check test leads if supplied then carry out a verification in accordance to the manufacturers specifications if available. This post will discuss tong tester types, operating principle and how to operate it. We offer diverse range of clamp meter tong tester in the market. Get tong tester at best price with product specifications. It is sturdy and made from the best grade of components that are.
Clamp meter abcs with technological advances in electrical equipment and circuits come more challenges for electricians and technicians. Tong tester or clamp meter basically works on the principle of mutual inductance. The law states that in a closed system of incompressible fluid, the pressure applied will exert equal amount of force in all the directions. What is clamp meter tong tester types, operating principle. Current transformer clamp meters are equipped with rigid jaws of made of ferrite iron. This series testing machine is widely used in aerospace, petrochemical industry,wire and cable,machinery manufacturing,plastic, rubber,mining,ceramic. Automatic tests take advantage of tireless machines to do more testing than humans can. Most pyrometers work by measuring radiation from the body whose temperature is to be measured. The working principle of an electronic energy meter is a device that measures the electronic energy consumed usually in kwh. Premeasurement steps to avoid electrical shock or personal injury. A current transformer based tong tester clamp meter consists of two clamps made of ferrite iron.
Dc clamp meters work on the principle of the hall effect. Best value tong tester great deals on tong tester from. Load determination distribution between generators operating in. Accessories for impact testing machines, self centering tong. However, in dc conductors, the current flows in a fixed polarity. An electrical meter with an integral ac current clamp is known as a clamp meter, a clampon ammeter, a tong tester or, colloquially, an amp clamp. It is an easy to use test equipment and is useful in the measurement of a liveconductor without damaging powering down the circuit. Dwt dead weight tester is based on the principle of pascals law. Electrical contractor working on panels and branch circuits measure loads on a branch circuit at a panel including feeder cables, branch circuits, and neutrals and the continuity of switches, fuses, and contacts measure load side voltage of a breaker or fuse check if a circuit is live before beginning work. Clamp meter tong tester digital tong tester wholesale.
You should be able to view any of the pdf documents and forms available on our site. Oct 22, 2017 tong tester or clamp meter basically works on the principle of mutual inductance. Megger working principle types history uses of megger. Ordinary clampmeters used to measure ac currents work on the principle of electromagnetic induction caused by the alternating current flowing in the conductor which reverses direction causing a dynamically changing magnetic field. Electrical engineering longowal polytechnic college. Current transformer clamp meter tong tester used to measure ac current. Infrared sensing techniques for adaptive robotic welding the current was measured using a columbia electric mfg.
A clamp meter is basically a currentmeasuring tool with some voltage abilities. Ensure that the tong tester multimeter used is of true rms type. Working on a hot circuit involves extra risk to the user and all equipment involved. For good insulation, the resistance usually reads in the megohm range. Current transformer clamp meter tong tester operating principle and how it works. Sep 07, 2009 a dc clampmeter works on the principle of the hall effect. For industrial appliances, industrial devices, residential commercial industrial electrical systems and commercial industrial hvac, clamp meters are used. When we touch mouth flat end of the metallic rod of phase or line tester with naked live hot wire whereas one of our finger touch the metallic cap screw or clip of phaseline tester, then circuit is completed and current start to flow in metallic rod, hence the neon. Conn0608 lay single three phase cable and install equipment at construction sites. An energy meter is used to measure the energy consumed in the kilowatt hours. Pdf test file congratulations, your computer is equipped with a pdf portable document format reader. A multimeter ora multitester, also known as a voltohm meter or vom is, an. Please note that the current output ot 440 volt capacitor connected to a system of 415 volt will be lesser than rated value.
It is an easy to use test equipment and is useful in the measurement of a liveconductor without damaging. Indispensable as a test tool, the jaws of a clamp meter facilitate work in tight spaces and permits. A clamp meter measures the vector sum of the currents flowing in all the conductors passing through the probe, which depends on the phase relationship of the currents. In general hall elements are used as a sensor to detect dc current because it is not possible to employ an electromagnetic induction method as used for dedicated ac clamp meters. An electrical meter with integral ac current clamp is known as a clamp meter, clampon ammeter or tong tester. The megger insulation tester is essentially a highrange resistance meter ohmmeter with a builtin directcurrent generator. Frequency meter phase sequence meter multimeter analog and digital tong tester techometer. Ammeter means amperemeter which measures ampere value. Working principle of megger voltage for testing produced by hand operated megger by rotation of crank in case of hand operated type, a battery is used for electronic tester. Keep fingers behind tactile barrier on face of meter. Uses of clamp meter for industrial appliances, industrial devices, residential commercial industrial electrical systems and commercial industrial hvac, clamp meters are used. Over which there is a coil wounded, which acts as a secondary coil. Introducing tecpel 3 34 digit clamp meter, 040a, 0400a, for current measurement from multimeter clamp on meter taiwan quality ma. Only one conductor is normally passed through the probe.
In general hall elements are used as a sensor to detect dc current because it is not possible to employ an. Electrical machines is a subject where a student will deal with various types of electrical machines. Induction motor three phase induction motor working principle. The jaws are individually wrapped by coils of copper wire. A wide variety of digital tong tester options are available to you, such as usage, feature, and power. Download as pptx, pdf, txt or read online from scribd.
Tong tester free download as powerpoint presentation. Ammeter working principle and types of ammeter electrical4u. Working of a phase or line tester when we touch mouth flat end of the metallic rod of phase or line tester with naked live hot wire whereas one of our finger touch the metallic cap screw or clip of phaseline tester, then circuit is completed and current start to flow in metallic rod, hence the neon bulb inside mains tester glows. When we touch mouth flat end of the metallic rod of phase or line tester with naked live hot wire whereas one of our finger touch the metallic cap screw or clip of phase line tester, then circuit is completed and current start to flow in metallic rod, hence the neon bulb inside mains tester glows. Jun 08, 2019 ammeter means amperemeter which measures ampere value. A digital multimeter dmm allows you to do electronic work because it offers high resolution, measuring. Texas international oilfield tools tiot offers a free standing test stand for testing of hydraulic casing and tubing power tongs. About 61% of these are clamp meters, 2% are power meters, and 4% are multimeters. The main principle of ammeter is that it must have a very low resistance and also inductive reactance. There are 156 suppliers who sells tong tester on, mainly located in asia. A clamp allows you to measure current without breaking the circuit and. In order to use a clamp meter, only one conductor is normally passed through the probe.
What is the working principle of taung tester clamp meter. Working principle of synchroscope and phase sequence indicator, tong tester clampon meter, signal generator, ac milivoltmeter, tachometer. Introducing tecpel 3 34 digit clamp meter, 040a, 0400a, for current measurement from multimeter clamp on meter taiwan quality manufacturer. Measuring the voltage output of a vfd is now a common measurement. Their basic operation is like that of a transformer. Construction working of mains tester working of a phase or line tester.
These advances not only require more capability in todays test equipment, but more skills on the part of the people who use them. Clamp meter is an eletrical tester having an ac clampmeter and voltemeter for testing the flow of electricity current in a conductor. A clamp meter usually measures to the nearest tenth or hundredth of a unit, rather than in the milliunits available with a dmm. They are distinctly different instruments, each with its own advantages. To convert a galvanometer into an ammeter, a shunt resistance is connected in parallel. The hall effect, named after edwin hall who discovered it 1879, states that when a conductor carrying current is placed in a magnetic field, a potential is induced across the conductor, transverse to an electric current in the conductor and a magnetic field perpendicular to the current. Phase sequence meter multimeter analog and digital,tong tester. The test stand is designed to resist torque applied by a power tong through a test mandrel. Energy meter digitalanalog insulation tester megger, earth tester. The clip or clamp or moving part of meter has a magnet in it which act as a magnetic core as in transformer. Together, they form a magnetic core during measurements. Working principle of synchroscope and phase sequence indicator, tong tester clampon meter.
Fluke tong tester buy and check prices online for fluke. Discover over 171 of our best selection of amp clamp meter, ac dc clamp, multimetr, clamp current on with topselling amp. The megger insulation tester is a small, portable instrument that gives you a direct reading of insulation resistance in ohms or megohms. Clamp meters working principle clamp meters using current transformer for ac measurement current transformer clamp meters are equipped with rigid jaws of made of ferrite iron. Radiation devices have the advantage of not having to touch the material being measured. Induction motor three phase induction motor working principle production of rotating magnetic field, squirrel. Ideally, ammeter function works only if it has zero resistance. Capacitors explained the basics how capacitors work working principle. This arm of the tong tester is connected to a measurement circuitry which in turn provides the currentreading finally. This series universal testing machine is mainly used to do stretching, compression and bending testing for metal and nonmetals such as rebar,wire rope,anchor rod,bolt fastener,cable and so on. Clamp meters using current transformer for ac measurement. By joining cr4 you can subscribe to this discussion and receive notification when new comments are added. In electrical and electronic engineering, a current clamp or current probe is an electrical device.
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